TW560217B - Reverberation processor - Google Patents

Abstract

The present invention is a reverberation processor, which is used to generate specific sound effect based on the specific virtual scene, wherein the virtual scene has the scene features, such as the specific space, the sound reflection effect, and the deterioration level. The present invention includes the following components: the natural series generator, for providing the natural series with corresponding item numbers based on the scene features; the series adjusting device used to output the audio signal by adjusting the gain and interval between items in the natural series based on the scene features; the filtering processor for filtering out the signal with specific frequency in the audio signal based on the scene features, and dividing the signal after processing into the high frequency signal and the low frequency signal; the high frequency reverberation generator and the low frequency reverberation generator are used to convert the high frequency signal and the low frequency signal into the high frequency reverberation signal and the low frequency reverberation signal respectively; and, the output device for combining the high frequency reverberation signal and the low frequency reverberation signal and outputting the specific sound effect.

Description

560217

5. Description of the invention (1) The present invention relates to a reverberation sound processor, and in particular to a reverberation sound processor that simulates a virtual sound effect in a virtual environment. , Virtual sound effects (including computer games, virtual reality systems, or electronic music systems, etc.) create a virtual world ’so that virtual listeners in it can hear multiple sounds that match the situation at the time. In order to generate sounds in the virtual world, virtual sound effects must simulate the sounds directly emitted by the sound source in the virtual environment. In computer games, it is necessary to simulate the sound effects that the player hears in a specific location in the virtual environment.

In virtual sound effects, reverberation is an important environmental factor, which reflects the effect of sound reflected by objects in this environment. The characteristics of reverberation sound effects have measurable standards, such as reverberation time, which represents the time required for sound to be reflected from attenuation to inaudibility. Figure 1 is a graph showing the change in the intensity of sound through reflection and echo artifacts. As shown in Fig. 1, the signal that reaches the listener first is direct 'and it is not reflected by surrounding objects. A series of separated reflections are then transmitted to the listener's ear. Finally, after a series of reflections, this series of reflected signals gradually combine and overlap to form a reverberation sound effect. The intensity of the reverberation sound effect depends on the size of the simulation area and the position of the listener.

At present, there are many studies on reverberation sound effects, however, the related circuits are quite complicated and do not meet the cost requirements. Therefore, the main object of the present invention is to provide a reverberation sound processor capable of simulating a reverberation sound effect close to the volume distribution shown in FIG. To achieve the above object, the present invention provides a reverberation sound processor

560217 V. Description of the invention (2) " -------- Present ^ ^ ΐ Produce specific sound effects according to specific virtual scenes, the nature of the virtual scene, ~ = the size of the room, the sound reflection effect and the degree of attenuation Special mention U :: pieces. The natural sequence generator is a natural sequence of axis response items according to the scene characteristic #. The series adjustment device is based on the scene characteristics. The gain and interval of each item in the natural series are output and the audio signal is output. The processor filters the above-mentioned audio signal according to the characteristics of the specific frequency band = bluff, and divides the processed signal into high audio signals and low audio two = two rain The frequency reverberation sound effect generator and the low frequency reverberation sound effect generator are divided into: audio signals and low audio signals are converted into high frequency reverberation signals and low reverberation signals. The output device combines the high-frequency echo signal and the signal and outputs the above-mentioned specific sound effects. Example: The reverberation sound processor according to the embodiment of the present invention, which is used in computer games, virtual reality systems, or electronic music systems, etc. ^ specific parameters according to the desired simulation scene, including space size, sound Reflective effects, transmission of sound media and other characteristic values produce the desired reverberation sound effect. Referring immediately to FIG. 2, FIG. 2 is a block diagram showing a response sound processor according to an embodiment of the present invention. The natural sequence generator 20 provides a natural sequence corresponding to the number of terms according to the characteristics of the scene, (Fibonacci / ,, the value of the natural sequence is ",!, 2, 3, 5, 8, 13 ... ΓΙ '

Fiu2 = Fn + FnH and FQ = 1, 卩 丨 = 1. Since the natural number series conforms to the trend of sound combination in nature, the use of the natural number series to indicate the volume of the reflected sound in nature is quite consistent.

560217 V. Description of the invention (3) Actual situation. Generally, if the sound is stronger, the natural sequence generator 20 provides more natural numbers, and if the sound is weaker, it provides fewer natural numbers. In addition, the number of terms in the natural series is also affected by the size of the simulated scene. For example, the narrower the space, the stronger the sound effect after reflection. Therefore, a larger number of terms must be provided. In the larger space, the reflected sound Less known gzhen, so fewer terms can represent the characteristics of a large space. The natural series provided will continue to derive other sound plastics, and the arrangement will be explained below. Because the different scenes will have different sound quality, the fr2 adjusts the gain and time scale of the natural series according to the characteristics of each simulated scene. For example, the gain of each item from the column = depends on the material of the simulated scene sound reflector:. The right is a hard and smooth object, which represents the effect of sound reflection. This volume is stronger than the J column adjustment device 22, that is, the original item is increased to increase the volume value to increase the volume. If it is a soft and coarse sugar object, it represents the effect of sound ^ reflection If it is worse, then adjust the number of Pei set 22 to decrease the value of this item: multiply the value of the original item by a smaller gain value to reduce the volume. In addition, the interval between items is also affected by the I simulation. If the space is wider, the sound is reflected to the listener: ： =: '' Therefore, the interval between the items is larger; The time shot is to the listener, so the interval between the items is small and small; after adjusting the anti-rectification device 22 on the second, a false J-effect tone signal is generated. «Effect of the audio of the embryonic shape, and in the process of sound being transmitted through the air medium, it will be affected by air Μ 0702-7570TWF ί 90Ρ146 * Robert.ptd page 6 560217 V. Description of the invention (4) The quality of W will be different. Its attenuation characteristics. Therefore, the filtering processor 24 filters the signal of the specific frequency band of the audio signal according to the scene determined by f. For example, in a humid environment, signals belonging to high frequencies will be more attenuated at lower frequencies. Therefore, the filter processor 24 uses its internal low-pass filter Uow pass fiiter to filter out some high-frequency signals to simulate actual status. In addition, because the processing program to be executed next is the processed signal, to the effect generator to get the final analog echo effect. However, because the high frequency signal has different reverberation sound characteristics, the filter processor 24 first distinguishes the processed signal into a high audio signal and a low audio signal. ^ Next, the high-frequency signal and low-frequency k number output by the filter processor 24 are not input to the high-frequency reverberation sound effect generator 26 and the low-frequency reverberation sound effect generator 28. Fig. 3 is a structural diagram showing the high-frequency reverberation sound effect generator 26 and the low-frequency reverberation sound effect generator 28. The structures of the high-frequency reverberation sound effect generator 26 and the low-frequency reverberation day-effect generator 28 are the same. The audio signal output by the filter processor 24 is passed through a delayer (32A ~ 32D) to make a proper delay, and a reverberation signal is generated. And send it to the output device 3〇, but the echo signal of the output will be fed back to the matrix multipliers 35A and 35B, and then add the diagonal matrix 33 (diagonal raatrix) and the constant matrix 34 (c0nstant). The supplied parameters will make the output echo signal more true. Because the reflection characteristics of high and low frequencies are different, there are different parameters in the matrix multipliers 35A and 35β. The above parameters can be set by the space size of the environment to be simulated, the reflection effect, and the degree of reflection attenuation. Finally, the generated high-frequency reverberation signal and low-frequency reverberation signal are input to the output device 30 ′. The output device 30 may be a sound effect card, a speaker, or a sound source device.

560217

, Can output effects to the operation summary, can be borrowed, and according to the effects and sound effects of reverberation effects, the spirit and scope of the present invention according to the inventor's ears, as described, according to the agricultural software provided by the sound software Degree of it. Due to this case, although the rumor is in a better range, the echo sound processor mentioned in the appendix can be used to achieve the sound effect of simulation reality. According to the embodiment of the present invention, the characteristics of the space size of a virtual scene in the form of a natural series of remodeling and superimposing characteristics can generate a fairly simple and early structure, and can produce a complex system circuit structure. The embodiment is disclosed above, but its And those who are familiar with this art will make a few changes and retouches, because the real-life simulation of the audio signals and sound reflections of the sound effects processor of the reverberation sound defined by the scope of the patent application is realistic. It is not intended to limit the standards of the present invention.

560217 The diagram briefly explains the above-mentioned purpose, features, and advantages of the invention, which can be more clearly and easily understood. • The best implementation examples of the cattle, with the accompanying drawings, will be described in detail as follows. · Figure 1 shows the sound history The intensity change after reflection and reverberation. Fig. 2 is a block diagram showing a reverberation effect processor according to an embodiment of the present invention. Fig. 3 is a structural diagram showing the high-frequency reverberation sound effect generator 26 and the low-frequency reverberation sound effect generator 28. Explanation of symbols • 20 ~ ran sequence generator j 22 ~ number adjustment device 24 ~ filter processor • > 26 ~ high frequency reverberation sound effect generator; 28 ~ low frequency reverberation sound effect generator; 30 ~ output device • 32Α, 32Β 32C, '32D delay 33 ~ diagonal matrix; 34 ~ constant matrix; 35Α, 35Β matrix multiplier 0

Claims (1)

560217 1. A specific sound reflection effect, a natural response number from a series of natural numbers, a specific frequency of the signal at each crossing, and a low-frequency high-frequency reverberation sound effect processor, suitable for special effects, the above virtual scene system It has specific * virtual characteristics of each hall, and the degree of attenuation, space size, and sound sequence generator, which are used to adjust the device according to the above-mentioned scene characteristics based on the above-mentioned 埸 α 埸 α series; ~ characteristics Term gain and interval to output an audio signal; & a processor to filter the above-mentioned audio band signal according to the characteristics of the above scene, and to distinguish the processed signal into a high-frequency signal signal; A device for converting the above-mentioned high-frequency signal; a low-frequency reverberation sound effect generator 'for converting the low-frequency reverberation signal into a low-frequency reverberation signal; and an output device for combining the above-mentioned high-frequency reverberation signal and low-frequency reverberation ^ § And output the above-mentioned specific sound effects. 2 · The reverberation sound processor described in item 1 of Shen Qing's patent scope, where the above natural number sequence is the Fibonacci number sequence. 3. The reverberation sound processor described in item 1 of the scope of the patent application, wherein the interval between the items in the natural series is affected by the space size of the virtual scene. 4. The reverberation sound processor described in item 3 of the scope of the patent application, wherein the larger the space of the virtual scene, the larger the interval between the items in the natural sequence. 0702-7570TWF; 90P146; Robert.ptd 560217 The reverberation sound processor described in item 1 of the above-mentioned application patent range in the patent application park, the number of up-frequency reverberation sound generators is based on the preset parameters of the virtual scene 1 4. = Low > The audio signal is converted into the above-mentioned low-frequency reverberation signal. In the revolving sound processor described in item 1 of the above-mentioned round of Shenmeng Qingfan, 15 of them are called Zhanye for sound cards. In the above: the application / specialization: the reverberation sound processor described in the audio item, which 0702-7570TW; 90P146: Robert.ptd